Locomotive-boiler furnace



Patented Sept. 23, 1919.

2 SHEETS-SHEET l.

ATTORNEY C. MARTIN, la. vLocoMoTlvE BongR FURNACE.

APPLlCATON FILED JAN. 3l. i919- W ITNESS ES f QTZO 7W www l J. C.MARTIN, JR. LCMOTIVE BUILER FURNACE.

APeucATioN FILED JAN. al, 1919.

2 SHEETS-SHEET 2.

WITNESSES Patented Sept. 23, 1919` reo f` JESSE c. MARTIN, Jn., orSAUSALITO, CALIFORNIA.

LoooMoTIvE-BGILER FUR'NACE.

faience.'

Specification of Letters Patent.

:Patented sept. ce, troia.

Application led January 31, 1919. Serial No. 274,585.

To all whom z'z may concern:

- Be it known that I, JESSE C. MARTIN,J r., of Sausalito, in the countyof Marin, State of California, have invented certain new vand usefulImprovements, vin Locomotive- Boiler Furnaces, of which the following isa specification.

The hereinafter described invention relates to that class of openbottomrefractory lined locomotive type ire boxes wherein the fuel isejected through a burner at the front end thereof and wherein thecombustion chamber is provided by the fire box proper and the closuresupported lfrom the mud ring thereof.

The objectof the invention is to provide means directly secured to themud ring of an open bottom refractory lined locomotive type -fire boxcombustion chamber for ysupporting the rear end refractory wall thereofso as to provide an air passage into the combustion chamber between'therefractory wall andthe rear end-of the fire box and to maintain suchwall in position entirely independent of supports secured to the sheetsof the fire box thereby eliminating the necessity' of cutting and'tapping holes with steam tight threads into the fire box Sheets forstuds to support the said wall, which with its weight andvibration ofservice causes frequent breakage of studs resulting in boiler failures,and hazard to enginemen as well as deterioration of the boiler sheetsfrom renewed tapping of larger holes for studs to replace the brokenones. e

Another object of the inventlon is to provide more substantial meansthan studs .tapped into fire box sheets for maintaining as required whenthe rear end refractoryv` wall is supported by studs tapped in fire boxsheets; the inaccessibility of such studs often calling for the removalof adjoining refractoryy linings as well as the refractory end wallitself with consequent expense of time and material.

To understand the invention referencev should be made to theaccompanying drawings wherein, Figure 1 shows a vertical longitudinalsection of an open bottom refractory lined locomotive type Vfire 'boxand pan forming therewith the combustion chamber, the pan provided withrefractory end' wall supporting means in accordance with my invention.Fig. 2 is a transverse section on line 2 2 Fig. l showing the rearendview of the supporting means whereby the refractory end wall ismaintained in place.

In the drawings numeral ll is used to designate a refractory linedlocomotive type fire box boiler, and Q the pan or closure attached by`studs vto the mud ring 3 of the fire box, the fire box and pan togetherforming the combustion chamber 4. The fuel is injected into thecombustion chamber through a burner 5, located at the front end thereof,toward the refractory end wall 6.

The refractory wall 6 is shown set out from the rear end of thefire boxand in the present adaptation of my invention against the plate 7, being:preferably inclined. The plate 7 is substantially fixed by angle irons8 and bracing members 9 to the pan 2 being entirely -free of any directattachment to the fire box sheets. Air is supplied into the combustionchamber 4 between the rear of the fire box and the refractory wall 6through a communicating draft opening 10 at the end of the pan 2. Theentire load of the refractory end wall 6 as shown is carried in the pan2, which being attached tothe mud ri-n the said wall directly to the mudring of the fire box.

In the use of the invention I do not restrict myself to the exact formof pan and supports as shown, it being within the scope 3. communicatesthe load of of the invention to provide any means nor- Y mally locatedat the lower portion of the lire box for supporting the refractory wallout of contact with the rear end of the fire box from the mudringthereof.

In practical service it is possible to maintain the refractory end wallas I Support it from the 'mud ring of the fire box combustion chamber atminimum cost and in accordance with locomotive'boiler rules andvregulations, performing inv a practical and efficient manner its truefunction of introducing air into the combustion chamber between tbe rearof the 'fire lbox and t'he wall as set out therefrom through the draftopening (10) at substantially the full width of the ico re box and Whilethe `combustible 'gases are at the farthest point from the flues, whichis highly desirable, this lbeing of particular importance in the widerty-pe locomotive fire lboxes which without this full width of airdistribution into the combusti-ble gases fail to receive the requisiteamount of oxygen necessary in the'rear corners of the fire box, and as aresult only partial oxidation 0f the combustible gases takes place withconsequent fuel loss and depositlng-`V of obf jectionable carbon in theflues of the boiler.

In a locomotive type fire box wherein the fuel is injected through a4burner at the 15 front end thereof and wherein a refractory end wallisset out from the rear end of the lire `box opposite the fuel deliveryof means for supporting the said refractory wall by the mud ring of there box.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JESSE o. Mairriu,V JR;

Witnesses ETHnL S. MARTIN.

